Tag Archives: prey competition

Big Bob and the beaking…Port Lincoln gets its first fish of the day

13 October 2022

Good evening, Everyone.

I couldn’t end the day without checking on Little Bob. When I closed my earlier blog, the Port Lincoln trio and Mum were waiting for Dad to bring in the first fish of the day. The osplets were already antsy and had been beaking one another. Each started the morning with a crop left from the late feeding last night but, by 0900 they had all dropped that crop and were hungry.

The first fish delivery arrived at 10:41:36. It was assumed, and rightly so, that Big Bob would eat the majority of any fish that arrived if not all of it. As it happened, Little Bob was getting some nice bites for several minutes even having a tug-o-war over a piece at 10:47:24. At that point, Little Bob had a small crop.

At 10:48:19, Big moves Middle out of the way so that he can brutally attack Little Bob. —The one saving grace this morning was that Little Bob did get up opposite Big and ate with his siblings. That is a big step from cowering yesterday and not even making a motion to eat. At 10:50:49, Big attacks Middle.

The long-awaited fish arrives. Even the osplets are fish crying to Dad.

Big is to the far left with Middle in the middle and Little Bob to the right.

At one-point Little Bob stands up to Middle and looks him in the eye. I just held my breath.

Little Bob has gotten some nice bites. Of course, not nearly as many as Big but, he is eating and he is up at the table and there is a small crop coming.

All is good and then it isn’t. Was the tug-o-war with Big and Big decided she had had enough of Little? I say ‘she’. Big is enormous. Not just from all the food she is consuming compared to the others but also because she has to be a female. It is also well known that the females are much more aggressive siblings especially if they are the first hatch. Their bodies will be at least 1/3 larger than the males and they have all those feathers to produce. They are often the last to fledge because of the time it takes them to fully develop compared to the smaller males.

Big is viscious. Just mean. She has had a lot of fish and yet, she is determined to terrorize the other two.

Then Big takes exception to Middle. Perhaps Big thought Middle had some food while it was dealing with Little. I want you to look at the size of Big’s wings and then look over at Little. Big is huge.

I have included this image. Big had a ps over the back of Little. I just want you to look again at the size. Little might have a peck at Big – which it shouldn’t – but Big is simply too big and could kill Little if she set her mind to it.

The fish is finished and both Middle and Little are fish calling at Mum. Let us all hope that much fish – great big fish – arrive on this nest today. Still, Little has eaten up at the table and that is a big step. Let’s watch and see what it does next time.

I wish I knew what it is that causes certain osprey nests to be more prone to siblicide and food competition. Is it toxins in the water? is it genetics? Is it just the psychological makeup of the osplets? is it gender? is it a mixture of all of these factors?

Thank you for joining me as I checked on Little Bob at Port Lincoln. Take care all. See you tomorrow.

Thank you Port Lincoln Ospreys for your streaming cam where I took my screen captures.

Late Thursday in Bird World

6 October 2022

Hi Everyone,

Thank you for joining me for a late check in. Our weather turned. Yesterday it was 21 C and we woke to 2 degrees C. It is now a balmy 4 degrees!!! Time to pull out that Possum beanie and a heavier jacket.

I have spent so much time checking on the Australian nests and worrying about Little Bob at Port Lincoln always getting his fill of fish that other nest news has been – well, neglected turns out to be the right word. So I have brought in some news form various sources that has been posted that should be of interest to everyone. I was particularly interested in Victor Hurley’s discussion of peregrine falcons and what has happened at the lege scrape – it certainly helps our understanding. Sadly, it does not bring our beloved M17 back. Other reports about eagles rebuilding and a lovely video on the banding of osplets. We will be looking forward to November when Port Lincoln chicks will be banded and weighed and measured. They will get names and one of them will get a sat-pak.

Making News:

Victor Hurley has posted an update on the adult falcons, M17 and F17, that were at the nest on the ledge at 367 Collins Street. This information is very helpful to understand what is going on at the scrape box with M22 and F22.

Photographs of Connie and Clive, alive and well, on Captiva have been released by Window to Wildlife. They will rebuild! I have seen no news on Lena and Andy. Their nest platform was completely destroyed and will, when the time is right, need to be replaced.

Harriet and M15 have been photographed rebuilding at their nest tree on the property of the Pritchett Family in Fort Myers, Florida following Hurricane Ian.

A great video showing the ringing of osprey chicks. Have a look!

The Bald Eagle couple on the E-3 nest at Kistache National Forest in Louisiana were caught on camera. The male delivered a fish to the nest and you should see the female squeeing and grabbing – first his poor talon and finally the fish. A quick look and then slo-mo. Incredible footage.

Cilla Kinross posted a video of the feeding of chick 2 at Orange. So cute. There has been some concern that the little one is not getting enough bites. Let’s see how it does today. I witnessed a few good bites at one feeding yesterday.

The sun came up at Melbourne and Mum22 went and found some leftover pigeon in the family pantry and is feeding the wee ones. It is 0645.

SE29 spent the night perched on the parent branch of the old Ironwood tree. SE30 did not have to be lonely. Later, you can see that an adult is higher up on the branch. SE29 and that adult have been encouraging SE30 to get higher on the branch and it worked! SE30 so wants to do what 29 is doing – flying but, s/he will in their own good time. Best to have the confidence than to get caught up being afraid with the Currawongs around.

Look carefully. SE29 is on the branch above SE30 and a parent is to the far left. You can see the white of their head in the V of the branch.

SE30 can sleep adult style!

You can see SE29 and the adult better in the image below.

SE30 is being encouraged by 29. It is up on the branch. Did I say that these two remind me so much of 25 and 26?

Well done 30!

29 has flown off and 30 is back down lower towards the nest looking out at that big world.

SE30 looks up to 29 (under the adult). I am sure we will see 30 getting higher on the branch, today. He so wants to be with his sibling.

They are waiting for a fish delivery at Port Lincoln. Big and Middle have already been at one another – the minute Mum gets off of them. Little just curls up and hides. It is the one difference from Ervie. Ervie stood up, looked at Big and gave it back. In this instance the beaking is much more violent than it was with Bazza. I don’t blame Little for just staying out of the way. No need to enter into the conflict. Just eat your meal and get out of the way.

Mum puts an end to it all but just sitting on them as best she can!

There was a feeding at 0633 at Orange. I could not possibly tell you how much the wee one got – but some, once its little head was still. Then, Diamond turned her back to the camera!

Such a big yawn out of such a little eyas.

Oopsie!

It appears that the wee one, once straightened up, did get some good bites.

Thank you so much for being with me this late afternoon. Take care. See you soon!

Thank you to the following for their streaming cams where I took my screen captures, their posts, and videos: 367 Collins Street Watchers, Window to Wildlife, SWFL Eagles and Donna Lee, RSPB, KNF, Dr Cilla Kinross and Charles Sturt Falcon Cam, Port Lincoln Ospreys, Sea Eagles@Birdlife Australia Discovery Centre Sydney Olympic Park, and 367 Collins Street by Mirvac.